To provide an electromagnetic solenoid in which a magnet wire is provided extending from one end of an electric insulating member provided to the periphery of an electromagnetic core to its other end, and is restrained from being disconnected or changing its electric resistance by another magnet wire wound on the above magnet wire.

The electric insulating member 70 is provided to the periphery of a center core 41 that serves as a part of an magnetic circuit, a groove 711 which is deep enough to bury, at least; a part of the diameter of the magnet wire 42 is provided to the peripheral surface of the electric insulating member 70; and the magnet wire 42 is provided inside the groove 711 provided to the electric insulating member 70, extending from one end 72 of the electric insulating member 70 to its other end 73. The magnet wire 42 located at the other end 73 of the electric insulating member 70 is reciprocated between the one end 72 and the other end 73 to be wound on the periphery of the electric insulating member 70 in odd-numbered layers for the formation of a coil unit 42a.